from django.db import models
from django.contrib.auth.models import AbstractUser
from itsdangerous import TimedJSONWebSignatureSerializer as TJSSerializer, BadData
from django.conf import settings


from meiduo_mall.utils.models import BaseModel

# Create your models here.


# 自定义用户模型类
class User(AbstractUser):
    # 添加一个电话字段
    mobile = models.CharField(max_length=11, unique=True, verbose_name='⼿机号')
    # 添加一个邮箱是否经过验证
    email_active = models.BooleanField(verbose_name="邮箱验证状态", default=False)
    # 添加一个默认地址的字段
    default_address = models.ForeignKey('Address', related_name='users', null=True, blank=True,
                                        on_delete=models.SET_NULL, verbose_name='默认地址')

    # 原型类
    class Meta:
        db_table = 'tb_users'  # 指明数据库表名
        verbose_name = '⽤户'  # 在admin站点中显示的名称
        verbose_name_plural = verbose_name  # 显示复数

    # 加密邮箱验证链接的函数
    def generate_email_verify_url(self):

        serializer = TJSSerializer(settings.SECRET_KEY, 600)
        data = {
            "user_id": self.id,
            "username": self.username,
        }
        token = serializer.dumps(data).decode()
        verify_url = 'http://www.meiduo.site:8080/success_verify_email.html?token=' + token
        return verify_url

    @staticmethod
    def check_verify_email_token(token):
        serializer = TJSSerializer(settings.SECRET_KEY, 600)
        try:
            data = serializer.loads(token)
        except BadData:
            return None
        else:
            userid = data.get("user_id")
            username = data.get("username")
            try:
                user = User.objects.get(id=userid, username=username)
            except User.DoesNotExist:
                return None
            return user


class Address(BaseModel):
    """
    用户地址
    """
    user = models.ForeignKey(User, on_delete=models.CASCADE, related_name='addresses', verbose_name='用户')
    title = models.CharField(max_length=20, verbose_name='地址名称')
    receiver = models.CharField(max_length=20, verbose_name='收货人')
    province = models.ForeignKey('areas.Area', on_delete=models.PROTECT, related_name='province_addresses', verbose_name='省')
    city = models.ForeignKey('areas.Area', on_delete=models.PROTECT, related_name='city_addresses', verbose_name='市')
    district = models.ForeignKey('areas.Area', on_delete=models.PROTECT, related_name='district_addresses', verbose_name='区')
    place = models.CharField(max_length=50, verbose_name='地址')
    mobile = models.CharField(max_length=11, verbose_name='手机')
    tel = models.CharField(max_length=20, null=True, blank=True, default='', verbose_name='固定电话')
    email = models.CharField(max_length=30, null=True, blank=True, default='', verbose_name='电子邮箱')
    is_deleted = models.BooleanField(default=False, verbose_name='逻辑删除')

    class Meta:
        db_table = 'tb_address'
        verbose_name = '用户地址'
        verbose_name_plural = verbose_name
        # 按照更新时间排序
        ordering = ['-update_time']